Simplify pushing function argument for context allocation.

src/ia32/full-codegen-ia32.cc

Index: src/ia32/full-codegen-ia32.cc
diff --git a/src/ia32/full-codegen-ia32.cc b/src/ia32/full-codegen-ia32.cc
index c6f275bbdc3213c47340f6518aa689f64d0619e9..c5d3d3bc615382185d3e8a4fe47411791e31f092 100644
--- a/src/ia32/full-codegen-ia32.cc
+++ b/src/ia32/full-codegen-ia32.cc
@@ -4269,14 +4269,16 @@ void FullCodeGenerator::LoadContextField(Register dst, int context_index) {
 }
 
 
-void FullCodeGenerator::PushFunctionArgumentForContextAllocation() {
+void FullCodeGenerator::PushFunctionArgumentForContextAllocation(
+    Register scratch) {
   Scope* declaration_scope = scope()->DeclarationScope();
   if (declaration_scope->is_global_scope()) {
     // Contexts nested in the global context have a canonical empty function
     // as their closure, not the anonymous closure containing the global
-    // code.  Pass a smi sentinel and let the runtime look up the empty
-    // function.
-    __ push(Immediate(Smi::FromInt(0)));
+    // code.
+    __ mov(scratch, GlobalObjectOperand());
+    __ mov(scratch, FieldOperand(scratch, GlobalObject::kGlobalContextOffset));
+    __ push(ContextOperand(scratch, Context::CLOSURE_INDEX));
   } else if (declaration_scope->is_eval_scope()) {
     // Contexts nested inside eval code have the same closure as the context
     // calling eval, not the anonymous closure containing the eval code.